So glad to read this and see I'm not the only one feeling this way. I don't weigh myself often but my husband commented on how heavy I was when I sat on his lap earlier so we were curious.
The day I got my BFP I was 130lbs, and today at 32 weeks I'm 155lbs! 25lbs weight gain with 8 weeks still to go. The funny (confusing) part is, my bump is measuring perfect size, and people keep telling me how small I am and that I don't look like I've gained weight. I still fit in a lot of my pre-pregnancy clothes, even though I can't do up my jeans, so I don't actually understand where all this weight is. It must ALL be in my belly/stomach area, because I used to have a tiny waist, and the rest of my body doesn't seem to have changed.
I'm so freaked out that I've gained so much, yet apart from my belly I look no bigger!